There are a lot of changes, fixes, and known issues in the Release
Notes. Accordingly, T-Mobile subscribers who nab iOS Beta 3 can utilized
WiFi Calling, the feature that allows one to make calls over WiFi.
There's also a new iteration of Find My Friends.
As mentioned, iCloud Drive changes have taken place -- users will see
an option to upgrade to iCloud Drive, and according to the notes, may
also find issues with automatic syncing and "up to two minutes" for
signing in. Apple says a workaround to the syncing issue is rebooting
the mobile device.
Some keyboard changes have taken place, as well: there's a way to
toggle QuickType with the latest beta release, for example. Other
smaller tweaks include Shared Photo Streams being dubbed Shared Albums
and weather data being presented with a shift in its layout.
Accordingly, Apple has also released OS X Yosemite Preview 3, giving
developers access the previously-detailed Dark Mode, among some other
less notable tweaks and changes.
iOS 8.0 beta 3 is really a cool operating system for Apples's IPhone, Ipad.